Physico-chemical and phytochemical properties, antioxidant activity, and total phenolic content of the indigenous plant Lagikway (Abelmoschus manihot)
Date
6-2016
Degree
Bachelor of Science in Food Technology
Major Course
Major in Food Science
College
College of Agriculture and Food Science (CAFS)
Adviser/Committee Chair
Ara Fatima C. Algar
Abstract
This study aimed to determine the physico-chemical and phytochemical properties, antioxidant activity and total phenolic content of lagikway. Lagikway leaves were dried in a food dryer maintained at 50°C and were grinded. The powdered material was defatted with petroleum ether and was further extracted with 80% methanol and 80% ethanol. An aqueous extract was also obtained by boiling the powdered sample. The powdered samples were used for the physico-chemical analyses. Lagikway was found to have a moisture content of around 9.52% which is below the point of minimal bacterial and fungal growth. The total ash value which has a normal inorganic and organic compound complexes is around 10.54%. Ethanol was found to have the highest extractive value (91.33%). For the phytochemical screening, petroleum ether extract had the most phytochemicals. The total phenolics and flavonoid content were determined using Folin-Ciocalteu Assay with gallic acid and quercetin standards. The highest total phenolics (140.38 mg GAE/100g) and flavonoids content (106.27 mgQE/100g) was in the ethanol extract. The ethanol extract had the most active scavenging activity which was determined by DPPH assay. Due to lagikway?s natural antioxidant activity, high total phenolics and flavonoid content and its high stability and digestibility, lagikway was generally concluded as a good source of natural antioxidants and nutrients which are beneficial to the body.
Language
English
Location
UPLB Main Library Special Collections Section (USCS)
Call Number
LG 993.5 2016 F61 /G84
Recommended Citation
Guevara, Richelle Anne N., "Physico-chemical and phytochemical properties, antioxidant activity, and total phenolic content of the indigenous plant Lagikway (Abelmoschus manihot)" (2016). Undergraduate Theses. 5304.
https://www.ukdr.uplb.edu.ph/etd-undergrad/5304
Document Type
Thesis